No need to post the same question in different parts of the forum.
I have merged the post together here.

As mcjh_matt said zones don't have x and y parameters as they are not necessarily rectangular - although usually they are drawn that way.
It may be possible through GDL but it would mean comparing every node x and y value to get the minimum and maximum values.
The problem with that is that a zone could have any number of nodes.

I just have a room size object that I stretch from one corner to another diagonally and it gives me the length and width of the room.

Maybe the zone stamp could be scripted to have stretchy hotspots and the values could be derived from those.

Since 17 zones can be linked to stories but as far as I know there is now way to display them on multiple storeys even if their height spans across those storeys.

Seems like AC can do just about everything but build the project for you.....but can't do that simple X and Y information. Also seems like if someone can figure out how to do it with the simple object you refer to then AC could figure it out also.

Sorry for the sour grapes, but the zone tool could be great for schematics if it could include these two features. Otherwise I'm duplicating work.

I'd made this object in AC13 so it's been a while but I think there are some bugs in it. You need to stretch the diagonal hotspots for the object to read the room dimensions. There's another one in the depository as well--can't remember the name--that does a similar job.